docs: def cmd(self, cmd, *args, **kwargs):
          """Return :meth:`Server.cmd` defaulting ``target_window`` as target.
  
          Send command to tmux with :attr:`window_id` as ``target-window``.
  
          Specifying ``('-t', 'custom-target')`` or ``('-tcustom_target')`` in
          ``args`` will override using the object's ``window_id`` as target.
  
          Returns
          -------
          :class:`Server.cmd`
  
          Notes
          -----
          .. versionchanged:: 0.8
  
              Renamed from ``.tmux`` to ``.cmd``.
          """
          if not any(arg.startswith('-t') for arg in args):
              args = ('-t', self.id) + args
  
          return self.server.cmd(cmd, *args, **kwargs)